<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<my-search :bgcolor="'#7fffd4'" @click="gotoSearch"></my-search>
		
		
		<view class="scroll-view-container">
			
			<!-- 左滑区 -->
			<scroll-view scroll-y="true" class="letf-scroll-view" style="{height: wh + 'px';}">
				<block v-for="(item, index) in cateList" :key="index">
					<view :class="['left-scroll-view-item', index===active? 'active':'']" @click="activeChange(index)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			
			<!-- 右滑区 -->
			<scroll-view scroll-y="true" style="{height: wh + '';}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2, index2) in cateLevel2" :key="index2">
					<!-- 二级分类标题 -->
					<view class="cate-lv2-title">/{{item2.cat_name}}/</view>
					<!-- 其下的盒子分类导航区 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的每一项 -->
						<view class="cate-lv3-item" v-for="(item3, index3) in item2.children" :key="index3" @click="gotoGoodsList(item3)">
							<!-- 上图 -->
							<image :src="item3.cat_icon" mode="widthFix"></image>
							<!-- 下文 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
		

		
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	

	
	export default {
		mixins: [badgeMix],
		
		data() {
			return {
				// 当前设备可用高度
				wh:0,
				// 
				cateList: [],
				active: 0,
				// 二级分类
				cateLevel2: [],
				// 
				scrollTop: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoAsync()
			// const sysInfo = uni.getSystemInfo()
			// console.log(sysInfo)
			// 加了搜索框的50px后
			this.wh = sysInfo.windowHeight-50
			
			this.getCateList()
		},
		methods: {

			async getCateList(){
				const {data:res} = await uni.$http.get('/categories')
				if(res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				// 为二级分类列表赋值
				this.cateLevel2 = res.message[0].children
			},
			// 
			activeChange(index){
				this.active = index
				
				// 重新为二级分类赋值
				this.cateLevel2 = this.cateList[index].children
				// 
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			// 
			gotoGoodsList(item){
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid='+item.cat_id
				})
			},
			// 
			gotoSearch(){
				// console.log('ok')
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;
		background-color: #fff;
		
		.letf-scroll-view{
			width: 120px;
			
			.left-scroll-view-item {
				background-color: #f7f7f7;
				line-height: 60px;
				text-align: center;
				font-size: 12px;
				position: relative;
				
				&.active {
					background-color: #fff;
					&::before {
						content: ' ';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c00000;
						position: absolute;
						top: 50%;
						left: 0;
						transform: translateY(-50%);
					}
				}
			}
		}
	}
	.cate-lv2-title{
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 14px;
		}
		image{
			width: 60px;
			height: 60px;
			margin-bottom: 4px;
		}
		text{
			font-size: 12px;
		}
		
	}
</style>
